My scouts make an annual visit to tour the displays and learn about copper and
mining as part of the Geology merit badge.

Since the visitor's
building was removed prior to the slide, perhaps it could be temporarily set up
down by the entrance with a new section or film about the slide and the efforts
going into the recovery effort. A virtual tour of the mine after the slide would
be great. That would make it worth the visit even without being able to look
into the mine itself.

Of course, if you are going to go to all the
trouble to document all that in electronic form, set it up on a website and
people the world over could visit the mine!